Are there any compatibility issues with the cPanel full restoration process between versions of cPanel?
Because of changes to the backup system and other system features (for example, Horde), there are several compatibility issues in the restoration process.
MySQL® and PostgreSQL database passwords
In cPanel & WHM version 11.42 and later, the system restores PostgreSQL databases to the account but does not restore the user’s password. This action locks the user out of the databases.
The next time the user manages a database with the phpPgAdmin program, the system refreshes the user’s privileges and restores their access.
You cannot restore Horde data from cPanel & WHM version 11.50 and later to an earlier version of cPanel & WHM version.